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首页> 外文会议>2017 13th International Electrical Insulation Conference >Correlation assessment between actual pollution performance of insulator strings in DC and theoretical models
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Correlation assessment between actual pollution performance of insulator strings in DC and theoretical models

机译：直流绝缘子串实际污染性能与理论模型的相关性评估

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The performance of overhead line insulation in DC differs from AC mostly because of ionization of the airborne particles resulting from a unidirectional electric field. As a consequence, contamination levels in DC is typically more severe than for AC in the same environment. CIGRE and IEC have published technical guides and mathematical models to handle this situation at the stage of designing the insulation of a DC line. This paper gives a comparison between the insulation levels defined by these new models, actual field observations and laboratory test results. The difference pointed out show the necessity to engage into a new evaluation of the models which otherwise could lead to string lengths largely over dimensioned given their pessimistic approach.
机译：直流电中架空线绝缘的性能与交流电不同，主要是由于单向电场导致的气载颗粒电离。结果，在相同的环境中，直流电中的污染水平通常比交流电中更为严重。 CIGRE和IEC已发布技术指南和数学模型，以在设计直流线路绝缘阶段解决这种情况。本文对这些新模型定义的绝缘等级，实际现场观察结果和实验室测试结果进行了比较。指出的差异表明，有必要对模型进行新的评估，否则考虑到悲观的方法，这可能导致字符串长度大大超出尺寸。

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